Lifting jack



May 29, 1923. 1,456,827

C. S. PILLSBURY ET AL LIFTING JACK l Filed Aug. l. 1921 '3 Sheets-Sheet2 S31/wanton /Zs'u'y 2223 GMM/M24 fill May 29,` 1923. l 1,456,827

y C. S. PILLSBURY ET AL\ LIFTING JACK Filed Aug. l, 1921 y 3Sheets-SheetI 5 Patented May 29, 1923.

Unirse. stains LTFTING JACK.

Application led August 1. 1921. Serial No. 488,887.

fo all whom it may concern:

Be it known that we, CHARLES S. PILLS- ntrnv and Lien S. Siiis,citizensof vtheUnitedv States. residing at Pulaski, in the county of Pulaski andState of Virginia, have 'invented certain new and useful Improvements inLifting Jacks; and we dodeclare the kfollowing tobe a full, clear, andexact de! scription of the invention, such. as will enable othersskilled in the art to which it appertains to make and use theI same.

This invention relates to anY improved lift-l ing jack which isespecially, although lnot necessarily, designed for use in car shops,repair yards, and at points along railroad tracks where repairs are madeon passenger and freight cars, the same being especially advantageousfor placing the car coupling heads in alinement for quickand easycoupling.

The principal object of the invention is to generally improve uponlifting jacks by the provi-sion ,ofv o-ne of extreme simplicity anddurability which may be effectively em# ployed for hoist-ingextremely.heavy-"loads in the minimum amount of 'time. i v' Anotherobject of the invention is to provide a novel jack of this classembodying inner and outer telescoping lifting members which aresimultaneously elevatedat rela- 'tively different speeds, permitting thejack to be placed inoperative position in much less time vthan isordinarily required by jacks of similar construction,

A further object of the invention is to provide a jack embodying rackand pinion mea-ns for operatingthe hoisting members, said pinionsbeingrmountedon 'a shaft and said shaft having a binding Avor brakedevice associated therewith for holding vit against rotation, wherebythe hoisting .meme berswmay be held in various elevated positions towhich theyhave been moved without accidentally slipping or dropping.

A still further object ofthe invention. is to provide a jack embodying arotatable base with' radial feet designed tovbe supported on thecross-ties, the particular ,con-k struction employed enabling the baseand feet to be readily and properly-positioned for effective engagementwith said ties regardless of the'position of the couplers.

Other objects and advantages of they invention will be apparent duringthe course ofthe following description.

rami param 'oF-FICE f In the accompanyingV drawings forming"- a part ofthis specification and in which like numerals are employed to designatelike parts throughout the same:

Figure l is a front elevational view of la lifting jack constructed inaccordance with' 7, kthis invention showing .the hoisting .mem-s j bersininoperative position.`

Figure 2 is a central vertical sectional view through the jack showingthe internal constructionmore clearly. .I i

Figure 3 is a horizontal sectional. view` taken substantially ontheplane ofthe line i i' 3A-3 Aof Fig. 2. 'f' Figure 4 is a ing thehoisting members in raised position. Figure 5'is a sectional viewv taken.substantiajlply on the plane of the line'5-5 of Fig. 4.

i substantially on the planes ofthe lines 6 6.

detail sectionalY ishCiVYi-i` gures 6 and v7 aredetail sections takenspectively.

Broadly speaking, 4the invention contenti# I plates the provision ofa'vnovel jack em-'z bodying al standard and innerv and outert'el'-escoping hoisting y'inen'ibersg designed tofbe l simultaneously moved tooperative position at relatively different speeds, l'thus enablingthein. to be very quickly movedto effective position. Ordinarily, jacksembodyingielescoping sections are so y.constructed that 'one ofsaidsections is raised to its'limit and lowk standard in which similarlyshaped 'and constructed; telesco'ping innenaud outer hoisting members 2,and 3 respectively are vertically slidable.v In order to accomplish the.desired results, the standard is formed at Vone iside-near', itsupperend with a slot:

.through which :a relatively large ,pinion 5 is extended,` the latter.V`being engageable with a rack bar 6 on ,the inner hoisting mem-v ber 2.yThis pinionr vis keyedorfotherwise lixedly mounted onI a' horizontalrotating lshaft 7 journaled in Vspaced bearin'glugs 8 and 8a extendingoutwardly from the stand-` ard onopposite sides of the slot. This shaftis permitted to slide through its bearings and in, addition'to carryingthe largepinion, has keyedy thereon two smaller p'inionsv 9 iio whichare positionedfor (3o-operation with a pair of rack-bars 10 on the outerhoisting member 3 and are spaced from the bearing lugs. All of thesepinions are simultaneously rotated and it will thus be seen that thehoisting` members Will be simultaneously lifted. However, as beforeindicated, the different sizes of the pinions will cause the innerhoisting member 2 to be e-levated muchfaster than the member 3. lt maybe stated; here that the member 2in order to accommodate the: largepinion 5, andy rack bar 6 is formed with a groove 11, While the member`3. is flattened as indicated at'12 on the same side, this constructionservingto permit connection of the rack-bars 10 to said flattenedportions.. The standard 1 is bulged as indicated at 13 to accommodatethe rack-bars 10. Aspleviously indicated, the invention embodies meansfor maintaining the shaft 7. in. a stationary position7 that is, .thismeans; serves. to prevent sliding movement ofthe shaft and also to'rprevent rotation. The means referredto can better be seen, in Figs 1`and 3.. Reference being had tov these figures it will be seen that thebearing lug 8El is equipped with a screwthreaded', bushing 14 and aportion of this bushing extends beyond they bearing lug. The bushing isprevented against rotation by means of a set screw lll which, passesinto the bearing lug andv into a socket formed' in the, bushing.,Arranged on` the extended screw-threaded portion ofthe bushinglis a.manually rotated binding elemQIllJ. 1,5 including a handle 15a and a.substantially conical friction. surface 16 which isI designed forco-acti'on with an abutment 16e4 firedly mounted ontheshaft 7' and heldonY the latter by. means of a nut 17k which is in turn, held inpla-cebymeans of a Cotter pin 17a.l Referring now tothe other end, ofthe shafhdtvvill' be seen thatagfriction collar or. devi'celb i's boltedor otherwise secured to the adjacent bearing lug and an abutment 16b isfixed on the adjacent evtended, end of the shaft andis. designed for.oo-action withE thisl pant 15b. The-v collar 1Gb is like- Wisefixedlymounted on the shaft 7 and is held' against displacement by means of'anut and Cotter-pin bea-ring.. the same reference characters given thosevpreviously mentioned. Above it was pointed out that the smaller pinionsare both spaced from the inner surfacesof the lugs 8 and. 8a.Consequently, by grasping the handle 15a of the device 15 and rotatingit on thev screwthreads of the aforesaid bushing, it Will be seen thatit will, come into.engagement with the collar 16 and4 impart a slidingmovement to-the shaft 7 and will thus bind the adjacent small piniony 9yagainst the bearingl lugv8. Hence, the shaft 7 cannot then befrotated.It is obvious that When the parts 15VV and 16"1 are brought intoengagement with one another, the parts 15b and 16" are simultaneouslyengaged with one another. lnasmuch as the pinions 5 and 9 are keyed onthe shaft, it Will be seen that they will be held against rotation andthe telescoping sections of the shaft can thus be locked in any desiredposition.

To assist in preventing possible rotation of this shaft` I employ a pairof springpressed dogs 20 pivoted on the standard and co-operative Withthe. small pinions 9. It is obvious that thesev dogs permit rotation ofthe pinions in but a single direction. Then it is desired to, rotatesaid pinions. in an opposite direction.. the, dogsy are manuallydisengaged from the pinions and' swr-ing; up againstthe standard. yIt istor be notedV that flat springs 21 are associated with the dogs` and areanchored at both ends on the latter, being bowed adjacent their innerends, So that when the dogs` are swung; to. ineffective position, theywill be held by these springs'. iny said position.

For the purpose of impartingfrotation to said pinions, lV employ a,relatively smalland additional pinionv 22,. which, is mounted on a shaft23 journaled in bearing l'ugs24 on the standard 1. Attention may here bedirected to the fact that this. shaft is man,- ually rotated byl means'of al detachable crank handle 25` fitted on the squared end 26 of saidshaft. It may bepointedy out here that the hoisting ,memberv 2; isequipped on its upper end with, a` sivivelled oupshaped detachableseat27 which is particularly advantageous Vwhen used in connection withcar. couplers.

After the inner hoisting member 2 is raised. to.v a predeterminedheight,v it is desirable to lock it in the. positionito which itl hasbeen` moved. This. result is partially accomplished by the: aforesaidbrake.. However, l make user of additional means for use, in conjunctionWith, this brake.` The means referred to comprises a plurality' ofcircumferentially spaced' `pivotedV springprcssed latches 2 8 carried.by the member 3, and automatically. projectabl'ethrough openings 29 infthis member. Referring to F al., it ivilll be Seen that pins 30' serveas pivots for these latches.. However, when the hoisting member 2 isinraised position and supportinga heavy load, it is: desirable to taireall strain .olf ofvtliese pins-to prevent breakage thereof. To thisend,` the bearing openings 31 iii the` latches are made suffi#v cientlyVlarge toA permit said latches to rest on the bottoms of the openings 29rather than be directly supported by the pivot pins 30. Thisconstruction places the Weight and'strain on thehoisting member 3instead of. causing the pivot pins topantiallyv support" the load. Itmay be pointed' out here that the standard l is formed with externaldepressions 28a which serve to provide clearance spaces for theaforesaid latches, per-4 mitting free movement of the'latten The jack inadditionl to includinglthe parts already described, comprises, asbefore' indicated, a rotary base, preferablyrin: the form of a ring 32,rotatable ini a groove 33 in the lowerv end of the standardy l." Thestandard in additionto being formed'with this groove 33 isv formedAwith' continuous countergroove 34 vinto which thejieduced ends ofset-screws 35 extend, it being ob'- viou's" that l byr moving thel "set,screws, fthe base can be heldin any desiredpositionL The ring 32 carriesa plurality. of spaced radial feet 36 designedto rest ony the lcrossties to prevent possible tilting'of Vthe. jaclg. This particular kind ofbase including'tthe feet will be found extremely advantageous when usedalong railroad tracks, since` it can be efectively supported on thecross ties at the desired point.

The operation of4 hejack is as follows:

Assuming that the parts are in theposition disclosed in Figures '1and'j2,` it will be. seen that by grasping the liandgrip ofrthecrank-handle 25 and "rotating'the same, thev shaft 7 and :thepinionsthereon will be rotated. ln so doing, the hoisting members 2 and 3 willbe quickly. raised to the desired position. It is to be noted asbeforefindicated, that these members will be simultaneously raised, butlthe member* 2"will be raised much faster than the member 3, becauseofthe difference insize' ofthe pinions which co-act' with the[rack-harsen these members.'v Hence, littleor no timewill` be requiredin placing the `jack in 'operative position. When the hoisting member 2;is elevated sufficiently high to uncover fthe latches 28,A the springswhich are associated with the same will project themthroughi theopenings 29 so thatV they will become`engaged'jwith the lower :end't'ofthis-'member and in conjunction with the brake means re'- tain the'member in the position to' ,which' it has been moved. VA continuedV'rotation of thesliaft 7 "will continue to elevatethe members untilvthedesired height Vhasbeen reached. The spring-pressed pawlsor dogs 20will prevent accidental reverse rotation of the pinions during `theraising ofthe hoisting elements. However, `as before stated, by raisingthese dogs upwardly' and against the body v,of the standard, free r0-tation of the pinions will bepermittedin the opposite direction.v Thisis only done.

jvlien the jack is being loweredto ineffective position. As beforepointed out, the particularl type o f dogsandY springsemployed willserve to retain the. dogs 'in such eifective position without vanyspecial Vmeans vor without manually holding them in said position. It`may `be added here jtliat by :operatingthevbrake means of shaft 7 inthe manner heretofore set forth,v the sliaftcan be heid against pessimeremue@ and um telescoping sectionsl'thus heldv in` set posi-y tionjf'This binding me'afns' will"be" found especially; advantageous when itris.found necessaryy tojlower 'the hoisting -elerffi'eiits) after they dogs`havebeen disengaged' lfrom the pinioiis with which they co-operate. 'It

is obviousv "that if thesedogs.- werel .disev ylnforder to*disengagetlie latches fromftlie inner hoisting member, it" will" benecessary to raisebothglioisting members,"until the latches ,which arecarriedby theV member 3, are ypositioned about the upper yedge ofthestandard. Then, by pressing/the lingers4 against the fflatches, thelatter Vcan be disf engaged' and the hoisting member be permitted Atomovedown. y The foregoing description taken in con'- nection'- with thedrawings is sufficient to enable" persons 'skilled in the artn tojwhich`the invention relates to obtain a clear? understanding of the same andto make'no'te..

of the'various advantages and features "of the invention.v lInview offthi'sya, more lengthy fand detailed description is deemed unnecessary.

Since probably theibest resuitmay befpbtained l with the constructionand farrangef, ment herein shown andv described,- this;r is

taken as a vpreferred embodiment of they in vention.' 'However,` slightfminor changes comingwithin'the scope vof the subjoinedv vclaimsim'ay beresorted to'. Y v 7el "claim f `l. A `jack comprisingla standard,hoisting members slidably supported on `said standard,` said membersbeing lequipped withfra-ck bars, yashaftr 4rotatably imounted onfthestandard, pinions mounted on said shaftand y i vhaving their teethengaged with the teeth e of said` rack bars, 'one of :said pinionsybeing largerflthan the other,l whereby to simultaneously elevate thehoisting `members at relatively diiferentspeeds.

2. A 'jack-embodying fafst Y p a'ndard"having` V -a slotin one side near4its top, hoisting' niern- 'y bers slidably mounted lonl said standard,

,rackfbars lsecured lto said members,v one of saidbars being disposedopposite said" slot,

a -rotary i shaft-1 mountedl on the standard,

"large and small pinionsconnected tofsaid shaft, one ofsaid pinionsextending through iso f vco &

the aforesaid slot and being engageable with the yteeth on the rack baropposite said slot, they other pinion being engaged with the re-vmaining vrack bars so thatwhen the shaft is rotated, the pinionswill,simultaneously,eleT vate the hoisting members at relatively di-fferent speeds.l y

3. A jack comprising a hollow standard having a slot on one side nearits top, being also equipped 0n opposite sides of'this slot withbearing` lugs, inner andl outer telescoping hoisting members lslidalolyar# ranged in said standard, rack-bars on said members, one kofi-saidbarsk being. positioned opposite said slot, a shaft journaled in saidbearings, one large. and two smallfpinions lixedly mountedon said shaft,said large pinion extending through the. aforesaid slot and beingengageable with theratchet teeth on thev rack-bar opposite. this slot,the other pinionsbeing engaged with .the remaining rack-bars, wherebywhenthe shaft is rotated, the pinions will simultaneously elevatethehoisting members at different speeds..

el. A jack comprising a hollowstandard, inner and outer telescopinghoistingmembers slidably arranged in. said standard, rack-bars onsaidmembers. ashaft rotatably mounted on said standard, pinions iXedlymounted on said shaft and engageable with said raclrnbars, one of saidpinions being' sufficiently larger than the other to cause the hoistingmembers to be simultaneously lifted at different speeds with respect toone another.. l Y

5. A lifting jack including afstandard'havingbearing; lugs thereon, ashaftArotatab-ly and slidablymounted in said bearings, gearing fixed onsaid shaft between.- the.- lugs, being spaced from the innerI facesl ofthe latter, and means o-n said shaftforimpartingsliding movement theretoandv binding said gearing against one ofJ thelugs for holding the shaftagainst rotary movement.. y

(S. A .lifting jack embodying'. a gear` carrying shaft rotatably;and-slidably mountedon the standard. and brake means associated withsaidshaft forassistingin.preventing it from rotating andfor.moving.it.longitudi nally, said brake means embodyingfanabutmentsecured on yoneend of the shaft and an adjustable binding` device which-is associated with the abutment to obtainvafrictionlock andato impartsliding movement to. the shaft.

7. A lifting ack Y embodying,- a lstandard having spaced bearing lugsarranged thereon, a. horizontallyrdisposed shaftV rotatable and slidablein said bearings,.abntments on the oppositeends ofisaidshaft beyondsaidbearings, friction.devicesbetween said bear'- ings and said abutments.withwhich .thelatter` are. engaged, one of saidY devicesbeingadjustable. for bringing said abutments and devices into vtightvfrictionaly engagement withvone another.

'8. The structure set forth in claim T, wherein hoistin'ggears aresecured on the intermediate portion of `said sha-ft' between said lugs,l'whereby when the adjustable friction device vis actuated, one ofsaidgears will be brought into tight' frictional engagement with theadjacentl lug.

9. A liftingjackcomprising a standard, a hoisting deviceslidablylengaged therewith, said devicehavingratchet teeth, said standard being equipped with spaced bea-ring lugs, a shaft rotatably andslidably mounted in said bearings, a pinion iivedlyy mounted on saidshaft andl co-operable with said ratchet teeth, an. abutment onl one endof the shaft, and an adjustable binding device associated with ysaidvabutment for engagingv the latter andfimparting a sliding movementtothe shaft whereby tobindvsaid pinion vagainst one of the bearinglugsto prevent rotation of the shaft.r4 i

l0. A `)lifting j ack;V comlprising'a standard, a slidable hoistingdevice associated therewith and 'providedfwith teeth, bearings car-riedby said standard, ashaft rotatably and slidably monntfedinsaid bearings,av gear carried by said shaft and co-operable with said teeth', anexternally ys crewtlireaded 'bushing carried by one ofgsaid bearings, abinding device mounted onsaid bushing, and an abut'- ment on the shaftco-operable with said binding device for frictionally engaging said-`gear with'one ofsaid' bearings for preventingrotation; of the shaft.

11,'. The structure set' forth in claim 10 together with bindingmeans onthe opposite ,end of the shaft which is simnltaneouslyoperated v,whensaid-binding devicev is rendered effective. A 1

. l2. yfrjacl embodying-a plurality of'tele scoping. members, -theAintermediate member beingy provided in its wall withan opening, aspringpressed l latch arranged in said opening ,and held in ineffectivepositionl by theinner member and capable of'being pro- `jected to;support the inner member, said latchl being provided with acomparatively large bearing opening, and a pin extending cro-sswise ofthe aforesaid opening, said latch beingjournaled onr the pin and thebearing openingbeing of` sufficient diameter to relieve Ithe pin. ofdirect Aexcessive strains as set forth. v

18.' A liftingv jack comprising` a ho'llon7 standard havinga slotformedin one side near its top, pairs of upper and lower bea-r ing lugsarranged-on opposite sides of said slot, inner andoutertelescopinghoisting members slidablyarranged in said standard,rack. bars on said'mernbers, one of said bars being positioned oppositetheI aforesaid slot, horizontally disposed shafts j ournaled in thebearings off` the aforesaidlugs, said shafts being disposed in spacedparallelism, one large and two small pinions` Xedly secured on the uppershaft, said large pinion extendon ythe lower shaft land meshing 'withthe ing through the aforesaid slot being engageaforesaid large pinion,and a hand Crank Jfor able with the rack teeth on the bar oppositerotatingl said last nameoll Shaft. 10v the slot', the other pinionsbeing engaged In ytestimony whereof We have hereuntoy With the remainingrack bar so asto simultaset our hands.

neously lift the hoisting members at rela- CHARLES S. PILLSBURY. tivelydifferent speeds, a small pinion Xed 'LIGE S; SIMS.

